Exercise device



FIG. 1 is a perspective view of an exercise device;

FIG. 2 is a front elevation view of the exercise device;

FIG. 3 is a rear elevation view of the exercise device;

FIG. 4 is a right side elevational view of the exercise device;

FIG. 5 is a left side elevational view of the exercise device;

FIG. 6 is a top plan view of the exercise device; and,

FIG. 7 is a bottom plan view of the exercise device.

Any broken lines shown in FIGS. 1-7 are included for the purpose of illustrating environmental elements only and form no part of the claimed design. 

CLAIM The ornamental design for an exercise device, as shown and described. 